中文摘要：

本文从二自由度行波型超声波电机的驱动机理和基本结构出发,对定子结构进行了分析和介绍,利用所建立的有限元模型进行定子振动的模态分析。然后以电机定子表面点的振幅最大化为优化条件,对定子的结构进行优化。接着用ANSYS软件对定子进行不同倾角下的模态分析,得到定子谐振频率和倾角的关系。最后结合所设计的定子使用激光测振系统进行测试,用于确定最佳的定子倾角。测试结果表明,优化的定子使得定子表面点的振幅较大。

英文摘要：

The driving principle and basic structure of this kind of spherical ultrasonic motor are firstly introduced.Then optimal structure of stator is analyzed. By the established finite element model the stator vibration modal analysis is carried out and the resonance frequency can be calculated. And then according to the optimization conditions for dip angle of stator,the structure of the stator is optimized. Through ANSYS software the modal analysis and the harmonious response analysis in different dip angles of stator can be completed. So relation between resonance frequency of stator and dip angle can be deduced. Finally test of designed stator is carried out by laser vibration test system. The best angle of the stator can be determined and the significant experimental data can also be obtained.The test results show that the optimized stator is more in line with the actual operation characteristics,which is a more accurate guide for the motor design.